17 Apr
2019
17 Apr
'19
9:19 p.m.
On Tue, Apr 16, 2019 at 10:19:46PM +0200, Arnd Bergmann wrote:
Many drivers have ioctl() handlers that are completely compatible between 32-bit and 64-bit architectures, except for the argument that is passed down from user space and may have to be passed through compat_ptr() in order to become a valid 64-bit pointer.
Using ".compat_ptr = compat_ptr_ioctl" in file operations should let us simplify a lot of those drivers to avoid #ifdef checks, and convert additional drivers that don't have proper compat handling yet.
You forgot to mention that it even gets the previous commit to build ;-) IOW, that needs to be reordered.